Convert between CSS units like px, rem, em, vh, vw and more for responsive design.
A CSS Unit Converter is a tool that helps developers convert between different CSS units such as px, em, rem, %, vw, and vh. These units are essential in responsive web design, where elements need to adapt to different screen sizes and devices.Instead of manually calculating values, MeTen's CSS Unit Converter provides instant and accurate conversions, saving you time and eliminating guesswork during development.
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This tool supports all commonly used CSS units, including:
Quick answers to the most common questions about this tool.
px is a fixed unit, while em and rem are relative units. em is based on the parent element's font size, whereas rem is based on the root (html) font size. rem is more consistent for scalable layouts.
To convert px to rem, divide the pixel value by the root font size (usually 16px). For example, 32px equals 2rem if the root font size is 16px.
vw and vh are viewport-based units. 1vw equals 1% of the viewport width, and 1vh equals 1% of the viewport height. These units are useful for responsive layouts.
To convert px to em, divide the pixel value by the font size of the parent element. For example, if the parent font size is 16px, then 24px equals 1.5em.
Use rem when you want consistent scaling across the entire website. Unlike em, rem is not affected by nested elements, making it easier to maintain.
There is no single best unit. rem is ideal for typography, while %, vw, and vh are commonly used for layouts. A combination of units is typically used for fully responsive designs.
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